/*
 * Created : 2004/May/26
 *
 * Copyright (C) Azureus Software, Inc, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package plugins.disk;

import plugins.download.Download;
import plugins.download.DownloadException;
import java.io.File;


/**
 * @author TuxPaper
 *
 * @since 2.1.0.0
 */

public interface 
DiskManagerFileInfo 
{
	public static final int READ = 1;
	public static final int WRITE = 2;
	
	public static final int PRIORITY_LOW = -1;
	public static final int PRIORITY_NORMAL = 0;
	public static final int PRIORITY_HIGH = 1;

		// set methods
		
	public void 
	setPriority(
		boolean b );
	
  /**
   * Sets the file's download priority base on a number
   * 
   * @param priority Any number or {@link #PRIORITY_LOW}, {@link #PRIORITY_NORMAL}, {@link #PRIORITY_HIGH}
   * 
   * @since 4407
   */
	public void
	setNumericPriority(
		int		priority );
	
	public void 
	setSkipped(
		boolean b );
	
		/**
		 * Mark the file as deleted or not (deleted means the file will be truncated to take up minimum
		 * space). This is generally 0 <= X < 2*piece_length as pieces can span file boundaries.
		 * @since 2403
		 * @param b
		 */
	
	public void
	setDeleted(boolean b);
	
		// links the file to the named destination
	
	public void
	setLink(
		File	link_destination );
	
		// gets the current link, null if none
	
	public File
	getLink();
	
	 	// get methods
	 	
	public int 
	getAccessMode();
	
	public long 
	getDownloaded();
	
	/**
	 * Size when file is complete
	 */
	public long
	getLength();
	
	public File 
	getFile();
	
		/**
		 * returns liked file if it exists, direct otherwise
		 * @param follow_link
		 * @return
		 * @since 4.3.1.5
		 */
	
	public File
	getFile(
		boolean	follow_link );
	
	public int
	getIndex();
	
	public int 
	getFirstPieceNumber();
	
	public long
	getPieceSize();
	
	public int 
	getNumPieces();
		
	public boolean 
	isPriority();
	
		/**
		 * @since 4407
		 * @return
		 * @deprecated
		 */
	
	public int
	getNumericPriorty();

	
	/**
	 * 
	 * @return
	 * 
	 * @since 4.8.1.3
	 */
	public int
	getNumericPriority();

	public boolean 
	isSkipped();
	
	public boolean
	isDeleted();
	
	public byte[] 
	getDownloadHash()
	
         throws DownloadException;
	
	public Download 
	getDownload()
	
         throws DownloadException;
	
	public DiskManagerChannel
	createChannel()
	
		throws DownloadException;
	
		/**
		 * Creates a random read request - these will be executed against the download 
		 * sequentially
		 * @param file_offset
		 * @param length
		 * @param reverse_order	- deliver blocks to the listener in reverse order
		 * @param listener
		 * @return
		 * @throws DownloadException
		 */
	
	public DiskManagerRandomReadRequest
	createRandomReadRequest(
		long						file_offset,
		long						length,
		boolean						reverse_order,
		DiskManagerListener			listener )
	
		throws DownloadException;
}
